* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f5f5f5;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    margin-bottom: 20px;
    color: #333;
}

#message-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

input, textarea, button {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

button {
    background-color: #4CAF50;
    color: white;
    cursor: pointer;
    border: none;
}

button:hover {
    background-color: #45a049;
}

.message {
    background: #f9f9f9;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 4px;
    border-left: 4px solid #4CAF50;
}

.message strong {
    color: #333;
}

.message p {
    margin-top: 5px;
    color: #666;
}

@media (max-width: 600px) {
    .container {
        padding: 15px;
    }
    
    input, textarea, button {
        font-size: 14px;
    }
}